Shaft-coupling



Drum

D. BOORMAN.

'SHAFT GOUPLING. A I

Patented July 15, 1890.

(No Model.)

UNITED .STATES PATENT OFFICE.

DAVID BOORMAN, 4OF ALTOONA, PENNSYLVANIA.

SHAFT-COUPLING.

SPECIFICATION forming part of Letters Patent No. 432,364, dated July 15,1890.

Application filed April 24:, 1890.

.To all whom t may concern:

Beit known that I, DAVID BOORMAN, a resident of Altoona, in the countyof Blair and State of Pennsylvania, have invented certain new and usefulImprovements in Shaft-Couplings; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

y invention relatesto an improvement in shaft-couplings, the objectbeing to provide a simple and solid couplingwhich can be readilytightened, loosened, or coupled or uncoupled; and with this end in Viewit consists in a pair of shafts, a collar having keyseats or recessestherein and an opening through it to receive the ends of the shafts tobe coupled thereto, in connection with Wedgeshaped keys adapted to fitin recesses in the shaft and nuts or equivalent devices for tighteningthe coupling.

It further consists in certain novel features of construction andcolnbinations of parts, as will be hereinafter described, and pointedout in the claims.

In the accompanying drawings, Figure l is a side elevation showinginterior construction in dotted lines. Fig. 2 is an end elevation. Fig.3 is a detached view of the end of the shaft to be coupled, and Fig. 4fis a view of one of the keys.

' AandB represent a pair of shafts, the ends of which are provided withone or morepreferably two or three-key-seats l l. The depth of thelatter increase gradually as they extend from the extreme ends inwardtoward the center.

C is a collar, the center of which is bored to receive the ends of theshafts. The collar is provided with key-seats 2 2, cut straight throughthe collar, their number being double the number of key-seats in eachshaft, and when the ends of the shafts are inserted in the collar thekey-seats in the two shafts are made to register with alternatekey-seats in the collar, and the openings formed by such key-seats areadapted to receive suitable keys. D D represent these keys. They are atrifle longer, or, if more convenient, about the length of the collar,and their shape conforms.

to the openings made by the superposed keyseats, one end having aninclining edge adapted to rest upon the sloping portion of the key-seat,and the back is straight, as well Serial No. 349,298. (No model.)

as the portion b l), between the sloping portion and the small end ofthe key, so as to form no obstruction for the end of the shaft oppositethis portion. The keys are screwthreaded on the small end, and nuts 3 3are turned on them to draw them up tightly into the key-seats and totighten the shaft-coupling. The ends of the collar are preferablyfianged so that the ends of the keys are partially, if not Wholly,concealed. IVhen the parts are assembled, the alternate keys of courseare turned in opposite directions and the nuts are screwed on tightly.Vhen thus assembled, the shafts are held securely together and preventedfrom turning.

It is evident that slight changes might be resorted to in the form andarrangement of the several parts described without departing from thespirit and scope of my 4invention, and hence I do not Wish to limitmyself to the exact construction herein set forth; but,

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

I. In a shaft-coupling, the combination, with a pair of shaftshavingkey-seats formed therein, said key-seats increasing in depth fromthe ends 0f shaft toward center, of a collar having key-seats therein,keys made to conform to the shape of the openings formed by thekey-seats in the shafts and collar when registering with one another,and devices onl the ends of the keys for holding them securely in place,substantially as set forth.

` 2. In a shaftecoupling, the combination, with a pairof shafts havingkey-seats therein which increase in depth from the ends to Ward centerof shafts, of a collar having straight key-seats therein, keys formedvto correspond in shape Withthe openings formed by the key-seats in theshaft and collar registering with one another, the ends of the keysprotruding out at the ends of the collar and having threads thereon,nuts for tightening the keys, and iianges on the ends of collar,substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

DAVID BOORMAN.

Vitnesses:

PETER MORGAN, WALTER ROWLAND.

IOO

